20168618304 has 448 divisors, whose sum is σ = 62144672256. Its totient is φ = 5735448576.

The previous prime is 20168618303. The next prime is 20168618329. The reversal of 20168618304 is 40381686102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20168618303) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 147216124 + ... + 147216260.

Almost surely, 2^20168618304 is an apocalyptic number.

20168618304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20168618304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31072336128).

20168618304 is an abundant number, since it is smaller than the sum of its proper divisors (41976053952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20168618304 is a wasteful number, since it uses less digits than its factorization.

20168618304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 20168618304 in words is "twenty billion, one hundred sixty-eight million, six hundred eighteen thousand, three hundred four".